BIO 2301 Exam 1 UPDATED ACTUAL
Exam Questions and CORRECT Answers
The following beaker of solution is .15 M of NaCl. how many osmoles are in the solution -
CORRECT ANSWER - .3 Osmoles
Which of the following will cause a neurotransmitter to be released from a neuron - CORRECT
ANSWER - voltage gated channels allow calcium to enter the presynaptic axon terminal
simple diffusion is "simple" because particles moving need no assistance or helpers to get across
the membrane due to the fact that these particles are usually polar, large, and lipid insoluble. -
CORRECT ANSWER - false
regulation of blood glucose level is an example of - CORRECT ANSWER - negative
feedback mechanism
how would osmolarity of a solution change if water, but not solutes, was added? - CORRECT
ANSWER - the osmolarity would decrease
what is the normal osmolarity of plasma - CORRECT ANSWER - 300 mOsm or .3 M
The movement of particles across a cell membrane during simple diffusion is driven by
differences in concentration across the membrane. - CORRECT ANSWER - True
A person is given an IV of distilled water. What will happen to his red blood cells? - CORRECT
ANSWER - hemolysis
A solution of glucose that is 0.3 M is iso-osmolar and isotonic. - CORRECT ANSWER -
true
,The effect of oxytocin on parturition or labor is an example of: - CORRECT ANSWER -
positive feedback mechanism
A cell is placed in to a solution. Upon microscopic inspection of the cell, there appears to be no
noticeable change in shape or size to the cell. What type of solution has this cell been placed? -
CORRECT ANSWER - isotonic
A sample of blood is added to a .6 M solution of Glucose. What effect would you expect to see
upon the individual red blood cells? - CORRECT ANSWER - The cells would shrink from
movement of intracellular water out of the cells.
All of the following concerning Norepinephrine is true except: - CORRECT ANSWER -
Increases blood vessel diameter in blood vessel supplying kidneys, liver, and digestive system
Through which of the following does a neurotransmitter alter the membrane potential of a
dendrite or postsynaptic cell? - CORRECT ANSWER - ligand gated channels
Which is true of PNS nerve regeneration? - CORRECT ANSWER - If only the axon is
destroyed, regeneration may occur
Which of the following is an adrenergic receptor which is involved with dilating the blood
vessels of the heart (coronary blood vessels)? - CORRECT ANSWER - beta
Which type of Na+ channel is primarily found along the axon? - CORRECT ANSWER -
Voltage gated
This portion of the nervous system includes the brain and spinal cord. - CORRECT
ANSWER - CNS
The projections from a neuron that are usually highly branched are the: - CORRECT
ANSWER - Dendrites
, This division of the nervous system is largely voluntary. - CORRECT ANSWER - somatic
Which of the following neurotransmitters is involved in neural processes which make pain? -
CORRECT ANSWER - Substance P
A current that causes a resting membrane potential of -70 mv to go to -90 mv is described as: -
CORRECT ANSWER - Hyperpolarizing
An IPSP or EPSP occurs on which part of a neuron? - CORRECT ANSWER - Dendrite
Which of the following receptors is directly involved in causing skeletal muscle contraction? -
CORRECT ANSWER - Nicotinic
Receptors for the neurotransmiter secreted by a neuron are often found on the axon terminals of
the presynatpic cell in order to facilitate which of the following? - CORRECT ANSWER -
increase reuptake and recycling of neurotransmitters
Schwann cells form myelin sheaths around the large nerve fibers in: - CORRECT
ANSWER - Peripheral nervous system
Flexible structure that allows for precise focus of light on the retina. - CORRECT
ANSWER - Lens
Both taste and smell receptors are considered chemoreceptors. - CORRECT ANSWER -
True
The main chromophore that absorbs light for each photoreceptor is: - CORRECT
ANSWER - Retinal
Exam Questions and CORRECT Answers
The following beaker of solution is .15 M of NaCl. how many osmoles are in the solution -
CORRECT ANSWER - .3 Osmoles
Which of the following will cause a neurotransmitter to be released from a neuron - CORRECT
ANSWER - voltage gated channels allow calcium to enter the presynaptic axon terminal
simple diffusion is "simple" because particles moving need no assistance or helpers to get across
the membrane due to the fact that these particles are usually polar, large, and lipid insoluble. -
CORRECT ANSWER - false
regulation of blood glucose level is an example of - CORRECT ANSWER - negative
feedback mechanism
how would osmolarity of a solution change if water, but not solutes, was added? - CORRECT
ANSWER - the osmolarity would decrease
what is the normal osmolarity of plasma - CORRECT ANSWER - 300 mOsm or .3 M
The movement of particles across a cell membrane during simple diffusion is driven by
differences in concentration across the membrane. - CORRECT ANSWER - True
A person is given an IV of distilled water. What will happen to his red blood cells? - CORRECT
ANSWER - hemolysis
A solution of glucose that is 0.3 M is iso-osmolar and isotonic. - CORRECT ANSWER -
true
,The effect of oxytocin on parturition or labor is an example of: - CORRECT ANSWER -
positive feedback mechanism
A cell is placed in to a solution. Upon microscopic inspection of the cell, there appears to be no
noticeable change in shape or size to the cell. What type of solution has this cell been placed? -
CORRECT ANSWER - isotonic
A sample of blood is added to a .6 M solution of Glucose. What effect would you expect to see
upon the individual red blood cells? - CORRECT ANSWER - The cells would shrink from
movement of intracellular water out of the cells.
All of the following concerning Norepinephrine is true except: - CORRECT ANSWER -
Increases blood vessel diameter in blood vessel supplying kidneys, liver, and digestive system
Through which of the following does a neurotransmitter alter the membrane potential of a
dendrite or postsynaptic cell? - CORRECT ANSWER - ligand gated channels
Which is true of PNS nerve regeneration? - CORRECT ANSWER - If only the axon is
destroyed, regeneration may occur
Which of the following is an adrenergic receptor which is involved with dilating the blood
vessels of the heart (coronary blood vessels)? - CORRECT ANSWER - beta
Which type of Na+ channel is primarily found along the axon? - CORRECT ANSWER -
Voltage gated
This portion of the nervous system includes the brain and spinal cord. - CORRECT
ANSWER - CNS
The projections from a neuron that are usually highly branched are the: - CORRECT
ANSWER - Dendrites
, This division of the nervous system is largely voluntary. - CORRECT ANSWER - somatic
Which of the following neurotransmitters is involved in neural processes which make pain? -
CORRECT ANSWER - Substance P
A current that causes a resting membrane potential of -70 mv to go to -90 mv is described as: -
CORRECT ANSWER - Hyperpolarizing
An IPSP or EPSP occurs on which part of a neuron? - CORRECT ANSWER - Dendrite
Which of the following receptors is directly involved in causing skeletal muscle contraction? -
CORRECT ANSWER - Nicotinic
Receptors for the neurotransmiter secreted by a neuron are often found on the axon terminals of
the presynatpic cell in order to facilitate which of the following? - CORRECT ANSWER -
increase reuptake and recycling of neurotransmitters
Schwann cells form myelin sheaths around the large nerve fibers in: - CORRECT
ANSWER - Peripheral nervous system
Flexible structure that allows for precise focus of light on the retina. - CORRECT
ANSWER - Lens
Both taste and smell receptors are considered chemoreceptors. - CORRECT ANSWER -
True
The main chromophore that absorbs light for each photoreceptor is: - CORRECT
ANSWER - Retinal
